I just finished up writing an article about How Spark's Once Attribute Works
. This was a lot better of an exercise than I had hoped. I've heard of two good practices that this successfully accomplished:
- Reading code to help you be a better developer
- Teaching somebody to help yourself learn it better
It wasn't exactly easy trying to explain some code that I, myself, didn't know very well. I had to read through and re-read to fully understand how the code works. It was a great exercise, I'll do this more often and highly recommend it to others as well!